Answer in brief
CVE-2026-64393 records a Unknown severity vulnerability in ksmbd: run set info with opener credentials. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <5cbabf3a71575cd31bc7785d92d4ab42338a654b || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <b35afd5cf8fab236ef21117e42ee45691d4ffa7b || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <0ce682867fd506f61f40c76bde7e4205bde34e87 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <20ee516a62989a8d505ee432f9e59525ea23984e || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <8cc9ec711f5255167247a9ab6a7179b787426ed7 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <b383bcad3d2fe634b26efbce53e22bbb5753a520 | 5cbabf3a71575cd31bc7785d92d4ab42338a654b, b35afd5cf8fab236ef21117e42ee45691d4ffa7b, 0ce682867fd506f61f40c76bde7e4205bde34e87, 20ee516a62989a8d505ee432f9e59525ea23984e, 8cc9ec711f5255167247a9ab6a7179b787426ed7, b383bcad3d2fe634b26efbce53e22bbb5753a520 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: run set info with opener credentials SMB2 SET_INFO handlers call path-based VFS helpers after checking the access mask granted to the SMB handle. Those helpers perform their owner, inode permission and LSM checks using the current ksmbd worker credentials. Run the complete SET_INFO dispatch with the credentials captured when the handle was opened. This also removes the separate security information credential setup and keeps all SET_INFO classes under one credential scope. Direct override_creds() is used because it can nest with the request credential overrides already used by rename and link helpers.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64393 records a Unknown severity vulnerability in ksmbd: run set info with opener credentials. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <5cbabf3a71575cd31bc7785d92d4ab42338a654b || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <b35afd5cf8fab236ef21117e42ee45691d4ffa7b || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <0ce682867fd506f61f40c76bde7e4205bde34e87 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <20ee516a62989a8d505ee432f9e59525ea23984e || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <8cc9ec711f5255167247a9ab6a7179b787426ed7 || >=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <b383bcad3d2fe634b26efbce53e22bbb5753a520 | 5cbabf3a71575cd31bc7785d92d4ab42338a654b, b35afd5cf8fab236ef21117e42ee45691d4ffa7b, 0ce682867fd506f61f40c76bde7e4205bde34e87, 20ee516a62989a8d505ee432f9e59525ea23984e, 8cc9ec711f5255167247a9ab6a7179b787426ed7, b383bcad3d2fe634b26efbce53e22bbb5753a520 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ksmbd: run set info with opener credentials SMB2 SET_INFO handlers call path-based VFS helpers after checking the access mask granted to the SMB handle. Those helpers perform their owner, inode permission and LSM checks using the current ksmbd worker credentials. Run the complete SET_INFO dispatch with the credentials captured when the handle was opened. This also removes the separate security information credential setup and keeps all SET_INFO classes under one credential scope. Direct override_creds() is used because it can nest with the request credential overrides already used by rename and link helpers.
Quoted source text, attributed separately from HOL analysis.